JPH0143342Y2 - - Google Patents
Info
- Publication number
- JPH0143342Y2 JPH0143342Y2 JP13761084U JP13761084U JPH0143342Y2 JP H0143342 Y2 JPH0143342 Y2 JP H0143342Y2 JP 13761084 U JP13761084 U JP 13761084U JP 13761084 U JP13761084 U JP 13761084U JP H0143342 Y2 JPH0143342 Y2 JP H0143342Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- oil
- chamber
- cylinder
- small diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000000694 effects Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Transmission Of Braking Force In Braking Systems (AREA)
Description
【考案の詳細な説明】
A 考案の目的
(1) 産業上の利用分野
本考案は、車両用急速充填型マスタシリンダ、
特にシリンダ本体に前部の小径部と後部の大径部
よりなる段付シリンダ孔を設け、このシリンダ孔
に、前記小径部および大径部に各対応する小径ピ
ストン部および大径ピストン部を有するピストン
を摺合し、このピストンの所定の後退位置で前記
小径ピストン部前方に形成される油圧室に開口す
るリリーフポートと、前記小径ピストン部および
大径ピストン部間に形成される補給油室に開口す
るサプライポートとを通油路を介して油槽に連通
し、前記通油路には弁装置を介装し、前記弁装置
は前記補給油室の圧力が所定値以上に上昇したと
き開弁する圧力応動弁と、前記油槽から前記補給
油室への一方向弁にのみ油の流れを許容する一方
向弁と、前記圧力応動弁および前記一方向弁を迂
回して前記油槽と前記リリーフポートとの間を連
通する流路抵抗の大きいバイパスとを備えたもの
の改良に関する。[Detailed explanation of the invention] A. Purpose of the invention (1) Industrial application field This invention is a quick-filling master cylinder for vehicles,
In particular, the cylinder body is provided with a stepped cylinder hole consisting of a small diameter part at the front and a large diameter part at the rear, and this cylinder hole has a small diameter piston part and a large diameter piston part corresponding to the small diameter part and the large diameter part, respectively. The pistons are slid together, and at a predetermined retracted position of the piston, a relief port opens into a hydraulic chamber formed in front of the small diameter piston section, and a relief port opens into a replenishment oil chamber formed between the small diameter piston section and the large diameter piston section. A supply port is connected to the oil tank via an oil passage, and a valve device is interposed in the oil passage, and the valve device opens when the pressure in the supply oil chamber rises to a predetermined value or more. a pressure-responsive valve; a one-way valve that allows oil to flow only through the one-way valve from the oil tank to the replenishment oil chamber; and a one-way valve that bypasses the pressure-responsive valve and the one-way valve to connect the oil tank to the relief port. This invention relates to an improvement in a device equipped with a bypass having a large flow resistance communicating between the two.
(2) 従来の技術
従来、この種マスタシリンダとして、シリンダ
本体の上部に油槽を、またシリンダ本体の側部
で、且つ油槽の下部に弁室をそれぞれ設け、その
弁室に一方向弁および圧力応動弁を配設したもの
が知られている。(2) Prior art Conventionally, this type of master cylinder has an oil tank in the upper part of the cylinder body, and a valve chamber in the side part of the cylinder body and in the lower part of the oil tank, and the valve chamber has a one-way valve and a pressure valve. A type equipped with a response valve is known.
(3) 考案が解決しようとする問題点
しかしながら、前記マスタシリンダにおいては
従来の油槽の幅(シリンダ本体の軸方向と直交す
る方向の長さ)を維持しつつその幅内にシリンダ
本体および弁室を収めるようにしているので、油
槽の幅を狭めようとすれば弁室の一部が油槽の下
部から側方へ突出し、同時に所定の油量を確保す
る関係から油槽の高さが高くなり、一方油槽の高
さを低くしようとすれば油槽の幅が従来よりも広
くなるといつた不具合がある。(3) Problems to be solved by the invention However, in the master cylinder, while maintaining the width of the conventional oil tank (the length in the direction orthogonal to the axial direction of the cylinder body), the cylinder body and the valve chamber are If you try to narrow the width of the oil tank, part of the valve chamber will protrude from the bottom of the oil tank to the side, and at the same time, the height of the oil tank will increase in order to secure the specified amount of oil. On the other hand, if an attempt is made to lower the height of the oil tank, the width of the oil tank will become wider than before, resulting in a problem.
本考案は上記不具合に鑑み、油槽の高さおよび
幅を狭めることができるようにした前記急速充填
型マスタシリンダを提供することを目的とする。 SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide the quick-filling master cylinder described above, in which the height and width of the oil tank can be reduced.
B 考案の構成
(1) 問題点を解決するための手段
本考案は、前記油槽を前記シリンダ本体の上部
に位置する上部油室と該上部油室に連通し、且つ
前記シリンダ本体の側部に位置する側部油室とよ
り構成し、前記シリンダ本体の下部に該本体の軸
方向に延びる小径シリンダを一体に設け、該小径
シリンダに前記通油路を形成すると共に該通油路
内に前記弁装置を収容する弁室を設け、前記一方
向弁を前記弁室の内端面に形成された弁座と、該
弁座と対向する中空筒状弁体と、該中空筒状弁体
を前記弁座側へ付勢する弁ばねとより構成し、前
記圧力応動弁を前記中空筒状弁体内に組込んだこ
とを特徴とする。B. Structure of the invention (1) Means for solving the problems The invention provides an arrangement in which the oil tank is communicated with an upper oil chamber located at the upper part of the cylinder body, and the oil tank is connected to the upper oil chamber located at the upper part of the cylinder body. A small diameter cylinder extending in the axial direction of the main body is integrally provided at the lower part of the cylinder body, and the oil passage is formed in the small diameter cylinder, and the oil passage is formed in the oil passage. A valve chamber for accommodating a valve device is provided, and the one-way valve includes a valve seat formed on an inner end surface of the valve chamber, a hollow cylindrical valve body facing the valve seat, and a hollow cylindrical valve body formed in the valve seat. The valve spring biases the valve seat toward the valve seat, and the pressure-responsive valve is incorporated into the hollow cylindrical valve body.
(2) 作用
ピストンが前進してリリーフポートが閉じられ
ると油圧室に油圧が発生し、その油圧は所定の機
器に伝達される。また補給油室の容積が縮小され
るので、その油室より排出される油はバイパスの
大きな流路抵抗および一方向弁の閉鎖により油槽
側へは殆んど戻らず、油圧室に急速充填される。
補給油室の油圧が圧力応動弁の規定の開弁圧力以
上に上昇すると圧力応動弁が開弁する。(2) Effect When the piston moves forward and the relief port is closed, hydraulic pressure is generated in the hydraulic chamber, and the hydraulic pressure is transmitted to the specified equipment. In addition, since the volume of the supply oil chamber is reduced, the oil discharged from the oil chamber hardly returns to the oil tank due to the large flow resistance of the bypass and the closure of the one-way valve, and is quickly filled into the hydraulic chamber. Ru.
When the oil pressure in the replenishment oil chamber rises above the prescribed opening pressure of the pressure-responsive valve, the pressure-responsive valve opens.
ピストンの後退時油圧室の減圧に伴い弁室の油
がサプライポートおよび補給油室を経て油圧室に
補給されると、一方向弁が開いて油槽から弁室に
油の補給が行われる。 When the oil in the valve chamber is replenished to the hydraulic chamber through the supply port and the replenishment oil chamber as the pressure in the hydraulic chamber decreases when the piston retreats, the one-way valve opens and oil is replenished from the oil tank to the valve chamber.
上記各部の油圧作動は、油槽を構成する上部油
室と側部油室とにより十分な油量が確保されてい
るので、長時間に亘り支障なく行われる。 Hydraulic operation of each of the above-mentioned parts can be carried out for a long time without any trouble because a sufficient amount of oil is ensured by the upper oil chamber and the side oil chamber that constitute the oil tank.
(3) 実施例
図面は本考案を自動二輪車におけるブレーキ用
マスタシリンダに適用した一実施例を示し、第1
図において急速充填型マスタシリンダMはそのシ
リンダ本体6と一体のブラケツト2を介して自動
二輪車の操向ハンドル1に固定される。3はブレ
ーキレバーで、ブラケツト2に支軸5を介して枢
着される。(3) Embodiment The drawing shows an embodiment in which the present invention is applied to a brake master cylinder for a motorcycle.
In the figure, a quick-filling master cylinder M is fixed to a steering handlebar 1 of a motorcycle via a bracket 2 that is integrated with a cylinder body 6 thereof. A brake lever 3 is pivotally mounted to the bracket 2 via a support shaft 5.
第2図に示すように、シリンダ本体6は車体の
左右方向に延び、そのシリンダ孔7にはピストン
8が摺合される。ピストン8は前後に並ぶ小径ピ
ストン部81と大径ピストン部82とを有し、これ
らピストン部81,82に対応してシリンダ孔7も
小径部71と大径部72を持つように段付に形成さ
れる。 As shown in FIG. 2, the cylinder body 6 extends in the left-right direction of the vehicle body, and a piston 8 is slidably fitted into the cylinder hole 7 thereof. The piston 8 has a small diameter piston part 8 1 and a large diameter piston part 8 2 arranged in front and behind, and the cylinder hole 7 also has a small diameter part 7 1 and a large diameter part 7 2 corresponding to these piston parts 8 1 and 8 2 . It is formed in steps so that it can be held.
小径部71の前端壁と小径ピストン部81間には
油圧室9が画成され、その前端壁の出力ポート1
0に図示しないブレーキ油圧回路が接続される。
また小径および大径ピストン部81,82間には補
給油室11が画成され、その油室11を小径ピス
トン部81の前端に付設された弾性ピストンカツ
プ12背面に連通させる油孔13が小径ピストン
部81に形成される。 A hydraulic chamber 9 is defined between the front end wall of the small diameter portion 7 1 and the small diameter piston portion 8 1 , and the output port 1 on the front end wall
0 is connected to a brake hydraulic circuit (not shown).
Further, a replenishment oil chamber 11 is defined between the small diameter and large diameter piston sections 8 1 and 8 2 , and an oil hole that communicates the oil chamber 11 with the back surface of an elastic piston cup 12 attached to the front end of the small diameter piston section 8 1 . 13 is formed on the small diameter piston portion 8 1 .
油圧室9にはピストン8を後退方向に付勢する
戻しばね14が縮設され、ピストン8の後退限は
その大径ピストン部82の背面が大径部72の内壁
に係止された止環15に当接することにより規制
される。 A return spring 14 that urges the piston 8 in the backward direction is compressed in the hydraulic chamber 9, and the backward limit of the piston 8 is such that the back surface of the large diameter piston portion 82 is locked to the inner wall of the large diameter portion 72 . It is regulated by coming into contact with the stop ring 15.
第3図に明示するように、シリンダ本体6には
油槽16が一体に設けられる。その油槽16はシ
リンダ本体6の上部に位置する上部油室161と、
その油室161に連通し、且つシリンダ本体6の
側部、図示例は車体の前後方向後側に位置する側
部油室162とより構成され、両油室161,16
2により所定の油量が確保される。また側部油室
162と同容量分だけ油槽16の高さを低くし、
または幅を狭めることができる。一方、前記同容
量分だけ油槽16の高さ方向および幅方向の容量
を減少させれば、油槽16の高さを低くすると共
に幅を狭めることができる。 As clearly shown in FIG. 3, an oil tank 16 is integrally provided in the cylinder body 6. The oil tank 16 includes an upper oil chamber 16 1 located at the upper part of the cylinder body 6;
The side oil chamber 16 2 communicates with the oil chamber 16 1 and is located on the side of the cylinder body 6 (in the illustrated example, on the rear side in the longitudinal direction of the vehicle body), and both oil chambers 16 1 , 16
2 ensures a predetermined amount of oil. In addition, the height of the oil tank 16 is lowered by the same capacity as the side oil chamber 162 ,
Or you can narrow the width. On the other hand, by reducing the capacity of the oil tank 16 in the height and width directions by the same amount, the height and width of the oil tank 16 can be reduced.
またシリンダ本体6の下部には、その本体6の
軸方向に延びる小径シリンダ17が一体に連設さ
れ、その小径シリンダ17の軸方向に通油路18
が形成される。その通油路18の前端側は連通路
19を介して側部油室162の底部に連通し、通
油路18の後端側は、ピストン8が所定の後退限
に位置するときリリーフポート20およびサプラ
イポート21を介して油圧室9および補給油室1
1にそれぞれ連通する。 Further, a small diameter cylinder 17 extending in the axial direction of the main body 6 is integrally connected to the lower part of the cylinder body 6, and an oil passage 18 extends in the axial direction of the small diameter cylinder 17.
is formed. The front end side of the oil passage 18 communicates with the bottom of the side oil chamber 162 via a communication passage 19, and the rear end side of the oil passage 18 is a relief port when the piston 8 is located at a predetermined retraction limit. Hydraulic chamber 9 and supply oil chamber 1 via 20 and supply port 21
1, respectively.
通油路18には長い円筒状弁室22が形成さ
れ、その弁室22に前記リリーフポート20およ
びサプライポート21が開口している。 A long cylindrical valve chamber 22 is formed in the oil passage 18, and the relief port 20 and supply port 21 are opened in the valve chamber 22.
弁室22内には、油槽16と補給油室11間の
連通を制御する弁装置23が設けられる。 A valve device 23 that controls communication between the oil tank 16 and the replenishment oil chamber 11 is provided within the valve chamber 22 .
この弁装置23は第4、第5図に明示するよう
に油槽16から補給油室11への一方にのみ油の
流れを許容する一方向弁24と、その一方向弁2
4内に組み込まれ、補給油室11の圧力が所定値
以上に上昇したとき開弁する圧力応動弁25と、
両弁24,25を迂回して油槽16とリリーフポ
ート20間を連通する流路抵抗の大きいバイパス
26とを備えている。 As clearly shown in FIGS. 4 and 5, this valve device 23 includes a one-way valve 24 that allows oil to flow only in one direction from the oil tank 16 to the replenishment oil chamber 11, and the one-way valve 24.
a pressure-responsive valve 25 that is incorporated in the replenishment oil chamber 11 and opens when the pressure in the replenishment oil chamber 11 rises to a predetermined value or more;
A bypass 26 with a large flow resistance is provided which bypasses both the valves 24 and 25 and communicates between the oil tank 16 and the relief port 20.
一方向弁24は、弁室22の、油槽16との連
通部側に位置する内端面に形成された弁座27
と、弁座27と対向する中空筒状弁体28と、中
空筒状弁体28を弁座27側へ付勢する弁ばね2
9とより構成される。中空筒状弁体28は弁座1
7側に位置し弁室22に回転および摺動自在に嵌
合される球状部28aと、、その球状部28aに
連設されそれよりも小径の円筒部28bとよりな
る。円筒部28bの端面には段部30が形成さ
れ、その段部30と弁室22の内端壁間に前記弁
ばね29が縮設され、通常は弁ばね29の弾発力
で球状部28aを弁座27に着座させて油槽16
を補給油室11に対して遮断している。球状部2
8aには、弁室2内の弁座側空間aと円筒部側空
間bを連通する4本の切欠き状連通路31が形成
され、球状部28aが弁座27より離間すると通
油路18の弁室22よりも上流部の油が各連通路
31を経て円筒部側空間bに流入する。 The one-way valve 24 has a valve seat 27 formed on an inner end surface of the valve chamber 22 that is located on the communication side with the oil tank 16.
, a hollow cylindrical valve body 28 facing the valve seat 27, and a valve spring 2 that urges the hollow cylindrical valve body 28 toward the valve seat 27.
It consists of 9. The hollow cylindrical valve body 28 is the valve seat 1
It consists of a spherical part 28a located on the 7 side and rotatably and slidably fitted into the valve chamber 22, and a cylindrical part 28b connected to the spherical part 28a and having a smaller diameter than the spherical part 28a. A stepped portion 30 is formed on the end surface of the cylindrical portion 28b, and the valve spring 29 is compressed between the stepped portion 30 and the inner end wall of the valve chamber 22. Normally, the resilient force of the valve spring 29 pushes the spherical portion 28a. is seated on the valve seat 27 and the oil tank 16 is opened.
is shut off from the supply oil chamber 11. Spherical part 2
8a is formed with four cutout-like communication passages 31 that communicate the valve seat side space a and the cylindrical part side space b in the valve chamber 2, and when the spherical part 28a is separated from the valve seat 27, the oil passage 18 is formed. The oil in the upstream part of the valve chamber 22 flows into the cylindrical part side space b through each communication passage 31.
円筒部28bの開口部には弁座部材32が装着
される。 A valve seat member 32 is attached to the opening of the cylindrical portion 28b.
前記圧力応動弁25は弁座部材32の内端面に
形成された弁座33と、その弁座33に対向する
球状弁体34と、球状弁体34と球状部28a内
の段部35間に縮設され、その球状弁体34を弁
座33側に付勢する弁ばね36とよりなり、通常
は弁ばね36の弾発力で球状弁体34を弁座33
に着座させて補給油室11を油槽16に対して遮
断している。 The pressure-responsive valve 25 has a valve seat 33 formed on the inner end surface of the valve seat member 32, a spherical valve body 34 facing the valve seat 33, and a gap between the spherical valve body 34 and a stepped portion 35 in the spherical portion 28a. The valve spring 36 is compressed and urges the spherical valve body 34 toward the valve seat 33. Normally, the resilient force of the valve spring 36 pushes the spherical valve body 34 toward the valve seat 33.
The replenishing oil chamber 11 is isolated from the oil tank 16 by being seated on the oil tank 16.
前記バイパス26は、弁室25の円筒部側空間
b、各連通路31、弁室22の弁座側空間aおよ
び球状部34の先端面に形成された細溝37より
なり、その細溝37は常に通油路18と弁室22
の弁座側空間aとを連通する。 The bypass 26 is composed of a space b on the cylindrical part side of the valve chamber 25, each communication passage 31, a space a on the valve seat side of the valve chamber 22, and a narrow groove 37 formed in the distal end surface of the spherical part 34. is always connected to the oil passage 18 and valve chamber 22.
and the valve seat side space a.
次にこの実施例の作用について説明すると、ブ
レーキペダルを操作してピストン8を図示の後退
位置から前進させれば、ピストン8は戻しばね1
4を圧縮しながら前進し、ピストンカツプ12が
リリーフポート20を閉じてからはピストン8の
前進量に応じて油圧室9に油圧を発生させ、この
油圧を出力ポート10より出力させて対応する車
輪ブレーキを作動させることができる。 Next, the operation of this embodiment will be explained. When the brake pedal is operated to move the piston 8 forward from the illustrated retracted position, the piston 8 is moved forward by the return spring 1.
4, and after the piston cup 12 closes the relief port 20, hydraulic pressure is generated in the hydraulic chamber 9 according to the amount of advance of the piston 8, and this hydraulic pressure is output from the output port 10 to drive the corresponding wheel. Brakes can be activated.
この間、特にピストン8の大径ピストン部82
の前進によれば、補給油室11の容積が縮小され
るので、該油室11より排出される油は細溝37
の大きな流路抵抗と一方向弁24における球状部
28aが球面を以て弁座27に着座していること
による確実なシール性とによつて油槽16側へは
殆ど戻らず、油孔13を通つてピストンカツプ1
2の外周部を前方へ撓ませながら油圧室9に圧送
される。かくして、油圧室9には圧油の急速充填
が行われ、その結果出力ポート10には早期に出
力油圧が発生し、車輪ブレーキの遊びが速やかに
取り除かれ、これらを時間遅れなく作動させるこ
とができる。 During this time, especially the large diameter piston portion 8 2 of the piston 8
As the oil chamber 11 moves forward, the volume of the replenishing oil chamber 11 is reduced, so that the oil discharged from the oil chamber 11 flows through the narrow groove 37.
Due to the large flow resistance of the one-way valve 24 and the reliable sealing performance due to the spherical part 28a of the one-way valve 24 being seated on the valve seat 27 with a spherical surface, the oil hardly returns to the oil tank 16 side and passes through the oil hole 13. piston cup 1
The outer periphery of 2 is forced into the hydraulic chamber 9 while being bent forward. In this way, the hydraulic chamber 9 is rapidly filled with pressure oil, and as a result, output hydraulic pressure is generated at the output port 10 at an early stage, play in the wheel brakes is quickly removed, and these can be operated without time delay. can.
油圧室9の昇圧により補給油室11の油圧が圧
力応動弁25の規定の開弁圧力以上に上昇する
と、球状弁体34を弁ばね36の力に抗して第
2、第4図左方へ移動させて圧力応動弁24を開
弁状態とするため、補給油室11のサプライポー
ト21より排出される油は圧力応動弁25から通
油路18の上流側を通つて油槽16へ戻され、こ
れにより補給油室11の過度の圧力上昇が抑えら
れるので、ピストン8の前進に支障を来すことは
ない。 When the hydraulic pressure in the replenishing oil chamber 11 rises above the prescribed opening pressure of the pressure-responsive valve 25 due to the pressure increase in the hydraulic chamber 9, the spherical valve body 34 is moved toward the left in FIGS. 2 and 4 against the force of the valve spring 36. In order to open the pressure-responsive valve 24, the oil discharged from the supply port 21 of the replenishment oil chamber 11 is returned to the oil tank 16 from the pressure-responsive valve 25 through the upstream side of the oil passage 18. As a result, an excessive pressure rise in the replenishment oil chamber 11 is suppressed, so that the forward movement of the piston 8 is not hindered.
ブレーキペダルより操作力を解除すれば、ピス
トン8はそれぞれ戻しばね14の戻し力により所
定の後退限に戻され、その戻り過程で油圧室9が
減圧し、ピストンカツプ12の外周部はその前後
の圧力差により前方へ撓んでシリンダ孔7内面と
の間に隙間を生じ、その結果弁室22の円筒部側
空間bの油がサプライポート21、補給油室11
および油孔13を経て油圧室9に補給され、これ
に伴い油槽16の油は中空筒状弁体28を弁ばね
29の力に抗して第2、第4図右方へ移動させて
一方向弁24を開弁状態とするため、その油は通
油路18の上流側より弁室22の円筒部側空間b
に効率良く流入する。この場合、一方向弁24に
おける球状部28aは弁室22内周面に線接触し
ているので、中空筒状弁体28の摺動抵抗が小さ
く、その弁体28の作動は円滑、且つ安定に行わ
れる。 When the operating force from the brake pedal is released, each piston 8 is returned to its predetermined retraction limit by the return force of the return spring 14, and in the return process, the pressure in the hydraulic chamber 9 is reduced, and the outer circumference of the piston cup 12 is moved forward and backward. Due to the pressure difference, it bends forward and creates a gap between it and the inner surface of the cylinder hole 7, and as a result, the oil in the cylindrical side space b of the valve chamber 22 flows into the supply port 21 and the replenishment oil chamber 11.
The oil in the oil tank 16 is supplied to the hydraulic chamber 9 through the oil hole 13, and the oil in the oil tank 16 is supplied by moving the hollow cylindrical valve body 28 to the right in FIGS. 2 and 4 against the force of the valve spring 29. In order to open the directional valve 24, the oil flows from the upstream side of the oil passage 18 to the cylindrical side space b of the valve chamber 22.
efficiently flow into the country. In this case, since the spherical portion 28a of the one-way valve 24 is in line contact with the inner peripheral surface of the valve chamber 22, the sliding resistance of the hollow cylindrical valve body 28 is small, and the operation of the valve body 28 is smooth and stable. It will be held in
ピストン8が所定の後退位置に戻れば、リリー
フポート20が油圧室9に開口するので、油圧室
9の過剰補給分はリリーフポート20およびバイ
パス26を通つて油槽16へ放出される(第4図
矢印参照)。 When the piston 8 returns to the predetermined retracted position, the relief port 20 opens to the hydraulic chamber 9, and the excess supply in the hydraulic chamber 9 is discharged to the oil tank 16 through the relief port 20 and the bypass 26 (Fig. 4). (see arrow).
上記各部の油圧作動時において中空筒状弁体2
8が第4図鎖線示のように傾いても、一方向弁2
4においてはその球状部28aが球面を以て弁座
27に着座しているので、球状部28aと弁座2
7間のシールが確実に行われ、また中空筒状弁体
28の傾きは圧力応動弁25の作動に何等影響を
与えることはなく、したがつて圧力応動弁25の
作動を常に円滑、且つ安定に行うことができる。 Hollow cylindrical valve body 2 during hydraulic operation of each of the above parts
Even if the valve 8 is tilted as shown by the chain line in Figure 4, the one-way valve 2
In No. 4, the spherical portion 28a is seated on the valve seat 27 with a spherical surface, so that the spherical portion 28a and the valve seat 2
7 is reliably sealed, and the inclination of the hollow cylindrical valve body 28 has no effect on the operation of the pressure-responsive valve 25, so that the operation of the pressure-responsive valve 25 is always smooth and stable. can be done.
また前記各部の油圧作動は油槽16を構成する
上部油室161と側部油室162とにより十分な油
量が確保されているので、長時間に亘り支障なく
行われる。 Moreover, the hydraulic operation of each of the above-mentioned parts can be carried out for a long time without any trouble because a sufficient amount of oil is ensured by the upper oil chamber 16 1 and the side oil chamber 16 2 that constitute the oil tank 16.
なお、バイパス26の細溝37は中空筒状弁体
28の円筒部28b周壁を貫通するオリフイスに
代えることができる。 Note that the narrow groove 37 of the bypass 26 can be replaced with an orifice passing through the peripheral wall of the cylindrical portion 28b of the hollow cylindrical valve body 28.
C 考案の効果
本考案によれば、油槽をシリンダ本体の上部に
位置する上部油室と、その上部油室に連通し、且
つシリンダ本体の側部に位置する側部油室とより
構成したので、従来と同様の油量を両油室により
確保することができると共に、側部油室と同容量
分だけ油槽の高さを低くし、または幅を狭めるこ
とができる。さらに前記と同容量分だけ油槽の高
さ方向および幅方向の容量を減少させれば、油槽
の高さを低くすると共に幅を狭めることができ
る。C. Effects of the invention According to the invention, the oil tank is constituted by an upper oil chamber located at the top of the cylinder body, and a side oil chamber communicating with the upper oil chamber and located at the side of the cylinder body. The same amount of oil as in the conventional oil chamber can be secured in both oil chambers, and the height or width of the oil tank can be reduced by the same capacity as the side oil chamber. Furthermore, by reducing the capacity of the oil tank in the height and width directions by the same amount as above, the height and width of the oil tank can be reduced.
さらにまた、シリンダ本体の下部にその本体の
軸方向に延びるように一体に設けられた小型シリ
ンダに通油路を形成し、その通油路に弁装置を収
容する弁室を設け、その弁室内に一方向弁の中空
筒状弁体を収容し、またその中空筒状弁体内に圧
力応動弁を組み込んだので、シリンダ本体下方の
死空間を有効に利用して弁装置をコンパクトに構
成することができる。 Furthermore, an oil passage is formed in a small cylinder integrally provided in the lower part of the cylinder body so as to extend in the axial direction of the body, a valve chamber for accommodating a valve device is provided in the oil passage, and the valve chamber is provided with a valve chamber for accommodating a valve device. Since the hollow cylindrical valve body of the one-way valve is accommodated in the cylinder body, and the pressure-responsive valve is built into the hollow cylindrical valve body, the dead space below the cylinder body can be effectively utilized to make the valve device compact. I can do it.
図面は本考案の一実施例を示し、第1図は全体
の平面図、第2図は第1図−線断面図、第3
図は第2図−線断面図、第4図は弁装置周り
の拡大断面図、第5図は第4図矢視方向から見
た中空筒状弁体の端面図である。
6……シリンダ本体、7……シリンダ孔、71,
72……小、大径部、9……油圧室、11……補
給油室、16……油槽、161,162…上部、側
部油室、17……小径シリンダ、18……通油
路、20……リリーフポート、21……サプライ
ポート、22……弁室、23……弁装置、24…
…一方向弁、25……圧力応動弁、26……バイ
パス、27……弁座、28……中空筒状弁体、2
9……弁ばね。
The drawings show one embodiment of the present invention, and FIG. 1 is an overall plan view, FIG. 2 is a sectional view taken along the line of FIG. 1, and FIG.
The drawings are a cross-sectional view taken along the line shown in FIG. 2, FIG. 4 is an enlarged cross-sectional view around the valve device, and FIG. 5 is an end view of the hollow cylindrical valve body viewed from the direction of the arrow in FIG. 6... Cylinder body, 7... Cylinder hole, 7 1 ,
7 2 ... Small, large diameter section, 9 ... Hydraulic chamber, 11 ... Supply oil chamber, 16 ... Oil tank, 16 1 , 16 2 ... Upper, side oil chamber, 17 ... Small diameter cylinder, 18 ... Oil passage, 20... Relief port, 21... Supply port, 22... Valve chamber, 23... Valve device, 24...
... One-way valve, 25 ... Pressure-responsive valve, 26 ... Bypass, 27 ... Valve seat, 28 ... Hollow cylindrical valve body, 2
9...Valve spring.
Claims (1)
りなる段付シリンダ孔を設け、このシリンダ孔
に、前記小径部および大径部に各対応する小径ピ
ストン部および大径ピストン部を有するピストン
を摺合し、このピストンの所定の後退位置で前記
小径ピストン部前方に形成される油圧室に開口す
るリリーフポートと、前記小径ピストン部および
大径ピストン部間に形成される補給油室に開口す
るサプライポートとを通油路を介して油槽に連通
し、前記通油路には弁装置を介装し、前記弁装置
は前記補給油室の圧力が所定値以上に上昇したと
き開弁する圧力応動弁と、前記油槽から前記補給
油室への一方向にのみ油の流れを許容する一方向
弁と、前記圧力応動弁および前記一方向弁を迂回
して前記油槽と前記リリーフポートとの間を連通
する流路抵抗の大きいバイパスとを備えた車両用
急速充填型マスタシリンダにおいて、前記油槽を
前記シリンダ本体の上部に位置する上部油室と該
上部油室に連通し、且つ前記シリンダ本体の側部
に位置する側部油室とより構成し、前記シリンダ
本体の下部に該本体の軸方向に延びる小径シリン
ダを一体に設け、該小径シリンダに前記通油路を
形成すると共に該通油路内に前記弁装置を収容す
る弁室を設け、前記一方向弁を前記弁室の内端面
に形成された弁座と、該弁座と対向する中空筒状
弁体と、該中空筒状弁体を前記弁座側へ付勢する
弁ばねとより構成し、前記圧力応動弁を前記中空
筒状弁体内に組込んだことを特徴とする車両用急
速充填型マスタシリンダ。 The cylinder body is provided with a stepped cylinder hole consisting of a small diameter portion at the front and a large diameter portion at the rear, and a piston having a small diameter piston portion and a large diameter piston portion corresponding to the small diameter portion and the large diameter portion, respectively, is provided in the cylinder hole. At a predetermined retracted position of the piston, a relief port opens into a hydraulic chamber formed in front of the small diameter piston part and a replenishment oil chamber formed between the small diameter piston part and the large diameter piston part. The supply port communicates with the oil tank via an oil passage, and a valve device is interposed in the oil passage, and the valve device has a pressure that opens when the pressure in the supply oil chamber rises to a predetermined value or more. a response valve, a one-way valve that allows oil to flow only in one direction from the oil tank to the replenishment oil chamber, and a space between the oil tank and the relief port by bypassing the pressure-response valve and the one-way valve. In a quick-filling master cylinder for a vehicle, the oil tank is connected to an upper oil chamber located at the upper part of the cylinder body, and a bypass having a high flow resistance communicates with the upper oil chamber, and A small diameter cylinder is integrally provided at the lower part of the cylinder body and extends in the axial direction of the main body, and the oil passage is formed in the small diameter cylinder, and the oil passage is formed in the small diameter cylinder. a valve chamber for accommodating the valve device therein; a valve seat formed on an inner end surface of the valve chamber; a hollow cylindrical valve body facing the valve seat; and a hollow cylindrical valve. 1. A quick-filling master cylinder for a vehicle, comprising a valve spring that urges a body toward the valve seat, and wherein the pressure-responsive valve is incorporated into the hollow cylindrical valve body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13761084U JPH0143342Y2 (en) | 1984-09-11 | 1984-09-11 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13761084U JPH0143342Y2 (en) | 1984-09-11 | 1984-09-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6152551U JPS6152551U (en) | 1986-04-09 |
JPH0143342Y2 true JPH0143342Y2 (en) | 1989-12-15 |
Family
ID=30696025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13761084U Expired JPH0143342Y2 (en) | 1984-09-11 | 1984-09-11 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0143342Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8714322B2 (en) * | 2012-01-16 | 2014-05-06 | Sram, Llc | Hydraulic brake mechanism |
-
1984
- 1984-09-11 JP JP13761084U patent/JPH0143342Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6152551U (en) | 1986-04-09 |
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